Hello all, my central locking device has ceased to work on my front passenger side door. All of the rest of the doors lock and open as they should on the button and with the key in the drivers side. I have to lock the car manually now and I am afraid that my passenger may forget to lock the door. Do the left and right all work on the same circuit? Is there a separate fuse possibly? Where do i start my testing? Are there things to test before removing the trim from inside of the door? I have a a meter. Where to start and what readings should i be seeing? There was no funny noises or intermittent tendances before the malfunction, just a plain - stop working. any help please, cheers, Jim